A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned
The time cost is very high by direct fluid-structure interaction method for mistuned bladed disk structures, so aerodynamic loads generally are ignored or treated as small perturbations in traditional flutter analysis. In order to analyze the flutter characteristics of mistuned blade rapidly and acc...
| Format: | Article |
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| Language: | zho |
| Published: |
EDP Sciences
2018-10-01
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| Series: | Xibei Gongye Daxue Xuebao |
| Subjects: | |
| Online Access: | https://www.jnwpu.org/articles/jnwpu/pdf/2018/05/jnwpu2018365p856.pdf |
| _version_ | 1797642338978234368 |
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| collection | DOAJ |
| description | The time cost is very high by direct fluid-structure interaction method for mistuned bladed disk structures, so aerodynamic loads generally are ignored or treated as small perturbations in traditional flutter analysis. In order to analyze the flutter characteristics of mistuned blade rapidly and accurately, this paper presents an efficient fluid-structure interaction method based on aerodynamic reduced order model. system identification technology and two basic assumptions are used to build the unsteady aerodynamic reduced order model. Coupled the structural equations and the aerodynamic model in the state space, the flutter stability of mistuned bladed disk can be obtained by changing the structural parameters. For the STCF 4 example, the response calculated by this method agrees well with the results obtained by the direct CFD, but the computational efficiency is improved by nearly two orders of magnitude. This method is used to study the stiffness mistuned cascade system, and the stability characteristics of the system are obtained by calculating the eigenvalues of the aeroelastic matrix. The results show that the stiffness mistuning can significantly improve the flutter stability of the system, and also lead to the localization of the mode. The mistuning mode, mistuning amplitude and fluid structure interaction can influence the flutter stability obviously. |
| first_indexed | 2024-03-11T13:58:38Z |
| format | Article |
| id | doaj.art-f1a002d1ef7e4cdf91bc3b6818246b64 |
| institution | Directory Open Access Journal |
| issn | 1000-2758 2609-7125 |
| language | zho |
| last_indexed | 2024-03-11T13:58:38Z |
| publishDate | 2018-10-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Xibei Gongye Daxue Xuebao |
| spelling | doaj.art-f1a002d1ef7e4cdf91bc3b6818246b642023-11-02T05:36:44ZzhoEDP SciencesXibei Gongye Daxue Xuebao1000-27582609-71252018-10-0136585686410.1051/jnwpu/20183650856jnwpu2018365p856A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned0123School of Aeronautic Engineering, Zhengzhou University of AeronauticsNational Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical UniversityNational Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical UniversityNational Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical UniversityThe time cost is very high by direct fluid-structure interaction method for mistuned bladed disk structures, so aerodynamic loads generally are ignored or treated as small perturbations in traditional flutter analysis. In order to analyze the flutter characteristics of mistuned blade rapidly and accurately, this paper presents an efficient fluid-structure interaction method based on aerodynamic reduced order model. system identification technology and two basic assumptions are used to build the unsteady aerodynamic reduced order model. Coupled the structural equations and the aerodynamic model in the state space, the flutter stability of mistuned bladed disk can be obtained by changing the structural parameters. For the STCF 4 example, the response calculated by this method agrees well with the results obtained by the direct CFD, but the computational efficiency is improved by nearly two orders of magnitude. This method is used to study the stiffness mistuned cascade system, and the stability characteristics of the system are obtained by calculating the eigenvalues of the aeroelastic matrix. The results show that the stiffness mistuning can significantly improve the flutter stability of the system, and also lead to the localization of the mode. The mistuning mode, mistuning amplitude and fluid structure interaction can influence the flutter stability obviously.https://www.jnwpu.org/articles/jnwpu/pdf/2018/05/jnwpu2018365p856.pdfreduced order modelfluid-structure interactionaeroelasticcomputational efficiencyfluttermistuned |
| spellingShingle | A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned Xibei Gongye Daxue Xuebao reduced order model fluid-structure interaction aeroelastic computational efficiency flutter mistuned |
| title | A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned |
| title_full | A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned |
| title_fullStr | A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned |
| title_full_unstemmed | A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned |
| title_short | A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned |
| title_sort | high efficient fluid structure interaction method for flutter analysis of mistuned |
| topic | reduced order model fluid-structure interaction aeroelastic computational efficiency flutter mistuned |
| url | https://www.jnwpu.org/articles/jnwpu/pdf/2018/05/jnwpu2018365p856.pdf |